Now that Supergirl has moved to The CW, the network is gearing up for an epic four-way crossover with Arrow, The Flash, Supergirl, and DC’s Legends of Tomorrow.

Ahead of its upfront presentation on Thursday, CW chief Mark Pedowitz touted Supergirl‘s move from CBS to The CW. “Just imagine what our superhero crossover episode is going to look like come December,” he told reporters, later following up by calling the event “our biggest one ever.”

Pedowitz then made it official during The CW’s upfront presentation. “Next season, Arrow, The Flash, Legends of Tomorrow, and now Supergirl will join forces in our annual crossover event, our biggest ever,” he said.

The news is unsurprising. It’s become an annual tradition for Greg Berlanti’s super series to cross over in the fall. It started when Arrow first introduced Grant Gustin as Barry Allen in season 2 of Arrow, following up the next season with a crossover between Arrow and The Flash. The two shows then crossed over with DC’s Legends of Tomorrow ahead of its launch, while The Flash also crossed over with Supergirl on CBS.

Following Pedowitz’s comments, Jane the Virgin star Gina Rodriguez jokingly tweeted about wanting her CW show to be involved in the crossover: “And #JaneTheVirgin? Too much? Ok, ok too much. But how many women have babies with no sex?!? #supermom.”